821330974 has 8 divisors (see below), whose sum is σ = 1296838440. Its totient is φ = 389051496.

The previous prime is 821330963. The next prime is 821330981. The reversal of 821330974 is 479033128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10806949 + ... + 10807024.

It is an arithmetic number, because the mean of its divisors is an integer number (162104805).

Almost surely, 2^821330974 is an apocalyptic number.

821330974 is a deficient number, since it is larger than the sum of its proper divisors (475507466).

821330974 is a wasteful number, since it uses less digits than its factorization.

821330974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21613994.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 821330974 is about 28658.8725179481. The cubic root of 821330974 is about 936.4963026204.

The spelling of 821330974 in words is "eight hundred twenty-one million, three hundred thirty thousand, nine hundred seventy-four".